The commit is pushed to "branch-rh7-3.10.0-957.12.2.vz7.96.x-ovz" and will
appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-957.12.2.vz7.96.1
------>
commit b58e8dd902592bab0fa4706d0beb9fdf8190f51d
Author: Pavel Butsykin <pbutsy...@virtuozzo.com>
Date: Tue May 21 18:47:42 2019 +0300
fs/fuse kio: implement pcs_strerror()
This function will be necessary to implement the requests statistics info.
Signed-off-by: Pavel Butsykin <pbutsy...@virtuozzo.com>
=====================
Patchset description:
Statistics for vstorage kernel fast-path
Vstorage provides plenty of statistics information via 'vstorage -c cl
mnt-top',
but when it comes kernel fast-path, it doesn't work. All because mnt-top
command collects information from .vstorage.info directory, where
vstorage-mount
provides a lot of different statistical information in the form of files,
but
it was not implemented for for fast-path.
This patch-set is aimed to implementation of the support of some statistics
inforamtion files from .vstorage.info:
cs_stats
fstat
fstat_lat
iostat
requests
Which will be located at "/sys/fs/fuse/connections/*mnt_id*/kio_stat/". This
will be enough to maintain vstorage mnt-top command for fast-path mount
points.
https://pmc.acronis.com/browse/VSTOR-20979
Pavel Butsykin (15):
fs/fuse: add conn_ctl to fuse_conn struct
fs/fuse kio: create sysfs stat directory
fs/fuse kio: implement iostat
fs/fuse kio: make common interface pcs_kio_file_list() for listing kio
files
fs/fuse kio: make common interface pcs_kio_req_list() for listing kio reqs
fs/fuse kio: add retry counter for kio requests
fs/fuse kio: implement pcs_strerror()
fs/fuse kio: implement requests statistics
fs/fuse kio: implement fstat statistics info
fs/fuse kio: implement fstat_lat statistics info
fs/fuse kio: remove useless pcs_cs initialization
fs/fuse kio: implement cs statistics accounting
fs/fuse kio: convert rpc state id to string
fs/fuse kio: implement cs_stats statistics info
fs/fuse kio: add locked cs_get_avg_in_flight()
---
fs/fuse/kio/pcs/pcs_error.h | 83 ++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 82 insertions(+), 1 deletion(-)
diff --git a/fs/fuse/kio/pcs/pcs_error.h b/fs/fuse/kio/pcs/pcs_error.h
index f4ec588943dc..19bf650e9df2 100644
--- a/fs/fuse/kio/pcs/pcs_error.h
+++ b/fs/fuse/kio/pcs/pcs_error.h
@@ -91,8 +91,89 @@ typedef enum {
PCS_ERR_MAX = PCS_ERR_UNKNOWN
} pcs_err_t;
+static const char *const prot_err_list[] = {
+ [0] = "Success",
+
+ [PCS_ERR_NOMEM] = "Out of memory",
+ [PCS_ERR_PROTOCOL] = "Fatal protocol error",
+ [PCS_ERR_AUTH] = "Authentication failure due to wrong
credentials",
+ [PCS_ERR_NET] = "Misc network error",
+ [PCS_ERR_NOSPACE] = "No space/quota exceeded while local
file io",
+ [PCS_ERR_IO] = "Misc error while local file io",
+ [PCS_ERR_LOST_LOCK] = "CN did not get response from MDS for
lease update.",
+
+ [PCS_ERR_NOT_FOUND] = "Requested object not found",
+ [PCS_ERR_INTERRUPTED] = "The operation was interrupted,
should be retried",
+ [PCS_ERR_NET_ABORT] = "Message dropped due to abort of
network connection",
+ [PCS_ERR_CONNECT_TIMEOUT] = "Failed connect()",
+ [PCS_ERR_AUTH_TIMEOUT] = "Authentication failure due to
timeout",
+ [PCS_ERR_RESPONSE_TIMEOUT] = "Peer did not respond or did not hold
deadline",
+ [PCS_ERR_WRITE_TIMEOUT] = "Socket write() failed, peer is stuck
or network is broken",
+
+ [PCS_ERR_CANCEL_REQUEST] = "Request was canceled by user",
+ [PCS_ERR_CANCEL_IO] = "IO request was canceled",
+
+ [PCS_ERR_LEASE_REQUIRED] = "Lease required",
+ [PCS_ERR_LEASE_EXPIRED] = "Lease is expired",
+ [PCS_ERR_LEASE_CONFLICT] = "Lease request conflicts with another
lease",
+ [PCS_ERR_INV_PATH] = "The path is invalid",
+ [PCS_ERR_NOT_DIR] = "Attempt to read non-directory",
+ [PCS_ERR_IS_DIR] = "Attempt to access directory
(resize/io)",
+ [PCS_ERR_NON_EMPTY_DIR] = "Attempt to rename/delete non empty
directory",
+ [PCS_ERR_ZERO_CHUNK] = "The requested chunk was not written
yet and contains zero data",
+ [PCS_ERR_INVALID] = "Object is invalid",
+ [PCS_ERR_INV_PARAMS] = "Invalid parameters",
+ [PCS_ERR_NO_ID] = "Request from the client without ID",
+ [PCS_ERR_INVALID_ID] = "The client or server ID is invalid
or banned",
+ [PCS_ERR_NORES] = "Not enough resources (too many
requests)",
+ [PCS_ERR_UNAVAIL] = "Service unavailable",
+ [PCS_ERR_BAD_CLUSTER] = "Bad cluster ID",
+ [PCS_ERR_READONLY] = "Invalid operation on read-only
object",
+ [PCS_ERR_PERM] = "Permission denied",
+ [PCS_ERR_UNSUPPORTED] = "Operation is not supported",
+
+ [PCS_ERR_TEMP_UNAVAIL] = "The resource is temporarily
unavailable",
+ [PCS_ERR_INTEGRITY] = "Not enough alive replicas available",
+ [PCS_ERR_INTEGRITY_FAIL] = "Fatal MDS integrity error",
+
+ [PCS_ERR_NO_STORAGE] = "The number of chunk servers in
cluster is less than the required number of replicas",
+ [PCS_ERR_NOT_ALLOWED] = "Operation is not allowed due to
licensing limitations",
+ [PCS_ERR_CFG_VERSION] = "Configuration version mismatch",
+ [PCS_ERR_CLNT_VERSION] = "Client version is incompatible with
server version (outdated)",
+ [PCS_ERR_EXISTS] = "Specified object already exists",
+ [PCS_ERR_EPOCH_MISMATCH] = "Object epoch mismatch due to
concurrent update",
+ [PCS_ERR_NO_DIR] = "Name directory does not exists",
+ [PCS_ERR_DIR_INST_VER] = "Name directory instance version
mismatch",
+ [PCS_ERR_CONTEXT_LOST] = "Operation context is lost on server
restart",
+
+ [PCS_ERR_CSD_STALE_MAP] = "Old map (or no map) at CS",
+ [PCS_ERR_CSD_RO_MAP] = "Write request with read-only map",
+ [PCS_ERR_CSD_WR_IN_PROGR] = "Read only map is rejected due to
write requests being processed",
+ [PCS_ERR_CSD_REPLICATING] = "Attempt to read from unfinished
replica",
+ [PCS_ERR_CANCEL_KEEPWAIT] = "IO request was canceled and
redirected to another CS",
+ [PCS_ERR_CSD_STALLED_REPL] = "Replication stalled",
+ [PCS_ERR_CSD_LACKING] = "Not enough CS servers available",
+ [PCS_ERR_CSD_DROPPED] = "The CS server was dropped by
administrator",
+ [PCS_ERR_MDS_NOT_MASTER] = "The target MDS is not current
master",
+ [PCS_ERR_MDS_EXIST] = "The MDS with such id already exist
in cluster",
+ [PCS_ERR_MDS_RM_TOOMANY] = "Removing this MDS will make the
cluster unusable",
+ [PCS_ERR_LICENSE_LIMIT] = "Operation can't be completed due to
license limitations",
+ [PCS_ERR_NO_LICENSE] = "No loaded license",
+
+ [PCS_ERR_SSL_CERTIFICATE_REVOKED] = "Certificate revoked",
+ [PCS_ERR_SSL_CERTIFICATE_EXPIRED] = "Certificate expired",
+ [PCS_ERR_SSL_UNKNOWN_CA] = "The certificate could not be
matched with a known, trusted CA",
+ [PCS_ERR_PEER_CERTIFICATE_REJECTED] = "The peer certificate has failed
the verification",
+};
+
/* Get long description of the error */
-const char *pcs_strerror(pcs_err_t errnum);
+static __inline const char *pcs_strerror(pcs_err_t errnum)
+{
+ if ((int)errnum < 0 || errnum >= ARRAY_SIZE(prot_err_list))
+ return "Unknown error";
+
+ return prot_err_list[errnum];
+}
/* Get short mnemonic */
const char *pcs_errname(pcs_err_t errnum);
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